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Basis Of Presentation And Summary Of Significant Accounting Policies (Narrative) (Details) - South Africa [Member] - July 2021 Civil Unrest In South Africa [Member] R in Millions, $ in Millions | 1 Months Ended | 3 Months Ended
--- | --- | ---
Oct. 31, 2021 ZAR (R) Item | Sep. 30, 2021 USD ($) | Sep. 30, 2021 ZAR (R)
Number of ATMs suffered damage | 173 |  |
Number of branches suffered damage | 19 |  |
Cost estimates to repair branches and damaged ATMs and to replace completely destroyed ATMs | R | R 40.0 |  |
July 2021 Compared To June 2021 [Member] |  |  |
Percentage decrease in ATMs transaction volume | 13.00% |  |
August 2021 Compared To July 2021 [Member] |  |  |
Percentage decrease in ATMs transaction volume | 3.00% |  |
Waiver Of Customers Pay To Utilize Other Bank's ATMs For August And September 2021 [Member] |  |  |
Lost transaction fee revenue |  | $ 0.4 | R 6.0

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